Dueling Protest Groups Hold Rallies in Boston

Conservative free speech advocates and left-wing counterprotesters held dueling rallies Saturday in the East Coast city of Boston as police say they will not tolerate violence from either side.

1People assemble on Boston Common before a planned "Free Speech" rally by conservative organizers begins, Aug. 19, 2017, in Boston.

2Counter protest groups gather for a 3 kilometer walk to the Boston Common.

3Organizers stand on the bandstand on Boston Common during a "free speech" rally staged by conservative activists, in Boston, Aug. 19, 2017. Counterprotesters stand along barricades ringing the bandstand.

4Boston Police and police from nearby districts, on bicycle patrol, getting final direction on the day's protests. City leaders have warned of zero tolerance for violence.